The present invention comprises a V-type 4-stroke internal combustion engine with 16 cylinders, having a counter-clockwise direction of rotation, comprising a firing sequence controller that fires the cylinders A1 to A8 and B1 to B8 in at least one of the following firing sequences, wherein the direction of rotation and the cylinder numbering is defined in accordance with DIN ISO 1204: a) A1-B7-A2-B6-A3-B5-A5-B1-A8-B2-A7-B3-A6-B4-A4-B8 b) A1-B7-A2-B6-A6-B4-A5-B1-A8-B2-A7-B3-A3-B5-A4-B8 c) A1-B7-A2-B5-A4-B3-A6-B1-A8-B2-A7-B4-A5-B6-A3-B8 d) A1-B4-A4-B6-A3-B7-A2-B8-A8-B5-A5-B3-A6-B2-A7-B1 e) A1-B5-A5-B3-A6-B2-A7-B1-A8-B4-A4-B6-A3-B7-A2-B8. and further shows a corresponding engine having a clockwise direction of rotation, comprising a firing sequence controller that fires the cylinders A1 to A8 and B1 to B8 in at least one of the following firing sequences: a) B1-A7-B2-A6-B3-A5-B5-A1-B8-A2-B7-A3-B6-A4-B4-A8 b) B1-A7-B2-A6-B6-A4-B5-A1-B8-A2-B7-A3-B3-A5-B4-A8 c) B1-A7-B2-A5-B4-A3-B6-A1-B8-A2-B7-A4-B5-A6-B3-A8 d) B1-A4-B4-A6-B3-A7-B2-A8-B8-A5-B5-A3-B6-A2-B7-A1 e) B1-A5-B5-A3-B6-A2-B7-A1-B8-A4-B4-A6-B3-A7-B2-A8.

The present invention comprises a V-type 4-stroke internal combustion engine with 16 cylinders, having a counter-clockwise direction of rotation, comprising a firing sequence controller that fires the cylinders A1 to A8 and B1 to B8 in at least one of the following firing sequences, wherein the direction of rotation and the cylinder numbering is defined in accordance with DIN ISO 1204: a) A1-B7-A2-B6-A3-B5-A5-B1-A8-B2-A7-B3-A6-B4-A4-B8 b) A1-B7-A2-B6-A6-B4-A5-B1-A8-B2-A7-B3-A3-B5-A4-B8 c) A1-B7-A2-B5-A4-B3-A6-B1-A8-B2-A7-B4-A5-B6-A3-B8 d) A1-B4-A4-B6-A3-B7-A2-B8-A8-B5-A5-B3-A6-B2-A7-B1 e) A1-B5-A5-B3-A6-B2-A7-B1-A8-B4-A4-B6-A3-B7-A2-B8. and further shows a corresponding engine having a clockwise direction of rotation, comprising a firing sequence controller that fires the cylinders A1 to A8 and B1 to B8 in at least one of the following firing sequences: a) B1-A7-B2-A6-B3-A5-B5-A1-B8-A2-B7-A3-B6-A4-B4-A8 b) B1-A7-B2-A6-B6-A4-B5-A1-B8-A2-B7-A3-B3-A5-B4-A8 c) B1-A7-B2-A5-B4-A3-B6-A1-B8-A2-B7-A4-B5-A6-B3-A8 d) B1-A4-B4-A6-B3-A7-B2-A8-B8-A5-B5-A3-B6-A2-B7-A1 e) B1-A5-B5-A3-B6-A2-B7-A1-B8-A4-B4-A6-B3-A7-B2-A8.

Various embodiments include a method for operating an internal combustion engine wherein the compression is variably adjusted comprising: checking a sensor signal indicative of a compression of the engine; checking the plausibility of the signal by: ascertaining a series of corresponding values of the signal and values of the actuating variable; determining a mathematical relationship between the signal and the variable based on the series; determining a deviation between the relationship and a predetermined characteristic relationship; and determining the signal is plausible when the determined deviation is lower than a predetermined threshold value; and if the determined deviation is higher than the predetermined threshold value, adjusting operation of the internal combustion engine.

Various embodiments include a method for operating an internal combustion engine wherein the compression is variably adjusted comprising: checking a sensor signal indicative of a compression of the engine; checking the plausibility of the signal by: ascertaining a series of corresponding values of the signal and values of the actuating variable; determining a mathematical relationship between the signal and the variable based on the series; determining a deviation between the relationship and a predetermined characteristic relationship; and determining the signal is plausible when the determined deviation is lower than a predetermined threshold value; and if the determined deviation is higher than the predetermined threshold value, adjusting operation of the internal combustion engine.

A crankshaft includes journals serving as a central axis of rotation, crank pins decentered from the journals, and crank arms connecting the journals and the crank pins. Some or all of the crank arms have counterweights integrated therewith. At least one of the crank arms has a recess in a crank pin facing surface. The crank arm includes ribs formed respectively in two side portions of the recess along a periphery of the crank arm.

A crankshaft includes journals serving as a central axis of rotation, crank pins decentered from the journals, and crank arms connecting the journals and the crank pins. Some or all of the crank arms have counterweights integrated therewith. At least one of the crank arms has a recess in a crank pin facing surface. The crank arm includes ribs formed respectively in two side portions of the recess along a periphery of the crank arm.

To provide a running gear structure of an internal combustion engine capable of reducing the size of the internal combustion engine. In a running gear structure of an internal combustion engine including a supercharger and a supercharger driving mechanism transmitting power to the supercharger and driving the supercharger, the supercharger driving mechanism is provided with driving force transmission members (a third intermediate gear and a fourth intermediate gear) disposed on a side opposite to cylinders of the internal combustion engine across valve trains driving a valve gear using, as a power supply, driving force of the crankshaft rotated by explosion in the cylinders. The valve train is disposed closer to an inner side of the internal combustion engine.

A crankshaft includes journals serving as a central axis of rotation, crank pins decentered from the journals, and crank arms connecting the journals and the crank pins. Some or all of the crank arms have counterweights integrated therewith. At least one of the crank arms has a recess in a crank pin facing surface. The crank arm includes ribs formed respectively in two side portions of the recess along a periphery of the crank arm.

A crankshaft includes journals serving as a central axis of rotation, crank pins decentered from the journals, and crank arms connecting the journals and the crank pins. Some or all of the crank arms have counterweights integrated therewith. At least one of the crank arms has a recess in a crank pin facing surface. The crank arm includes ribs formed respectively in two side portions of the recess along a periphery of the crank arm.

A balanced rotary engine for applying torque to a drive shaft. The engine has an outer casing with a main drive case. A cylinder is rotably mounted in the casing and a piston is mounted to move longitudinally within the cylinder. Two connecting arms, each with a connecting end, one of the ends is connected to the piston, and two crankshafts, each one being rotably connected to the other connecting end of the connecting arms. Two drive wheels are contra-rotably connected to the respective first and second crankshafts. A fixed drive ring has a circumferentially disposed drive member surface. The fixed drive ring is mounted in the case so that the drive member surface faces the piston. The two drive wheels mesh with the drive ring.